Roberts, B. (2013). Managing illegal immigration to the United States: How effective is enforcement? Council on Foreign Relations.
Chicago-Zitierstil (17. Ausg.)Roberts, Bryan. Managing Illegal Immigration to the United States: How Effective Is Enforcement? New York, NY: Council on Foreign Relations, 2013.
MLA-Zitierstil (9. Ausg.)Roberts, Bryan. Managing Illegal Immigration to the United States: How Effective Is Enforcement? Council on Foreign Relations, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.